Attachment for threshing-machines.



L. M. THOMSON. ATTACHMENT FOB. THRESHING MACHINES. APPLICATION rum) JULY so, 1908. nmmwnn APR. 20, 1910.

997,641, Patented July 11; 1911.

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L. M. THOMSON. ATTACHMENT FOR'THRESHING MACHINES. APPLICATION FILED JULY 30, 1903. RENEWED APR. 20, 1910.

997,641, Patented July 1-1, 1911.

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UNITED STATES PATENT OFFICE.

LUTHER M. THOMSON, OF ST. LOUIS PARK, MINNESOTA, ASSIGNOR OF ONE-HALF TO ADVANCE THRESHER COMPANY, OF BATTLE CREEK, MICHIGAN.

ATTACHMENT FOR THRESHING-MACHINES.

Specification of Letters Patent.

Patented July 11, 1911.

Application filed July 30, 1908, Serial No. 446,078. Renewed April 20, 1910. Serial No. 556,618.

To all whom it may concern:

Be it known that I, LUTHER M. THOMSON, of St. Louis Park, Hennepin county, Minnesota, have invented certain new and useful Improvements in Attachments for Threshing-Machines, of which the following is a specification.

The object of my invention is to provide means for rethreshing the repeat material and distributing it evenly across the sieves, thereby avoiding the necessity of returning the repeat material to the main threshing cylinder.

A further object is to provide a repeat distributing apparatus that is capable of use with an ordinary grain cleaning mechanism and repeat elevator.

Other objects of the invention will appear from the following detailed description.

The invention consists generally in a distributing device having one end adapted to receive the repeat material and the other end adapted to discharge the coarser material upon the cleaning mechanism while the part intermediate to the ends of said distributing device is constructed to deliver the fine material evenly upon the cleaning mechanism.

Other objects of the invention will appear from the following detailed description.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying drawings forming part of this specification, Figure 1, is a side elevation of a portion of a threshing machine with my invention applied thereto. Fig. 2 is a transverse vertical sectional view of the same. Fig. 3, is a detailed view showing the exterior of the auxiliary threshing mechanism. Fig. 4: is a sectional view illustrating the interior of the threshing mechanism. Fig. 5, is a sectional view on the line X-X of Fig. 4. Fig. 6, is a detailed view illustrating the means for increasing or decreasing the tension on the spring concave.

In the drawing, 2 represents the casing of the threshing machine, and 3 an inclined spout in which the repeat elevator 1 is arranged. The spout has a throat or discharge passage 5 at its upper end leading to an auxiliary cylinder, consisting preferably of rings 6 mounted on a shaft 7 and connected at intervals by bars 8 having teeth 9.

10 is a concave provided with lugs 11 through which a rod 12 passes into slots 13 in flanges 14 provided on a casing 15. Springs 16 connected to said rod tend to hold it in the upper ends of the slots 13, as indicated in Fig. 3. A yoke 17 has springs 18 at its ends and carries a screw 19 that is adapted to bear on the middle portion of the concave and hold it toward the cylinder with a yielding as indicated in Fig. 6. The inner face of the concave is corrugated as shown and cooperates with the teeth of the cylinder to thresh out the broken heads of grain delivered be tween them. A plate 22 is secured to the upper portion of the concave and adapted to bearon a curved wall 23 which partially incloses a roller 24. This roller is located just below the throat or passage 5 leading to the cylinder and is driven through a belt 25 engaging a sprocket wheel 26 on the shaft of said roller and the function of the roller is to feed the material in bet-ween the 1 cylinder and concave and prevent it from lodging auxiliary cylinder, falling into the trough, is

gathered up by the conveyer and fed into the machine. The trough is preferably semicircular in cross section and extends from the cleaning mechanism to a point preferably near the opposite wall of the threshing machine. The wall of the trough is provided with a series of perforations 30 through which the fine material may fall while the coarser material is carried along and discharged at the end of the trough. Some of the material through the revolution of the screw will be discharged over the edges of the trough, my purpose being to evenly distribute the fine material across the cleaning mechanism and discharge the coarse material at the end of the trough or conveyer. Any other suitable apparatus for distributing this fine material evenly across the cleaning. mechanism may be substituted in place of the trough and the screw conveyer. I do not wish, therefore, to be confined t0 the mechanism which I employ for this purpose.

By extending the conveyer only partially across the machine I am ableto discharge the coarse material at one end upon the cleaning mechanism which, if the conveyer was extended the entire width of the machine, might clog it and interfere with the successful distribution of the repeat material. I am able in this way to relieve the main cylinder of a considerable portion of its load and effect a more complete threshing of the broken heads of grain and obtain a far better separation of the grain from the chaff and straw than is ordinarily obtained when the repeat elevator returns the tailings directly to the main cylinder. This distributing apparatus for the repeat material may be used in connection with grain cleaners of various kinds with or without the auxiliary threshing attachment.

I claim as my invention:

1. The combination, with a grain cleaning mechanism, of a repeat elevator, a conveyer having one end in position to receive the material from said elevator, the opposite end of said conveyer being adapted to deliver the coarse material upon said cleaning mechanism, the intermediate portion of said conveyer having a floor or bottom through which the fine material is distributed evenly across said cleaning mechanism.

2. The combination, with a grain cleaning mechanism, of a repeat elevator, a perforate conveyer disposed transversely of the machine and constructed to receive the repeat material and distribute it evenly across the cleaning mechanism, said conveyer having an open discharge end through which the straw and coarse material are delivered to said cleaning mechanism.

3. In a threshing machine, the combination, with a conveyer and sieves, of a repeat elevator, an auxiliary cylinder and concave whereto the material is delivered by said repeat elevator, a screw conveyer ar-- ranged transversely of the machine, a

trough arranged beneath said screw conveyer and extending transversely of the machine and having an open discharge end, said trough terminating between the middle portion of said machine and the side wall thereof and adapted to receive the repeat ma terial from said auxiliary cylinder, the op eration of said screw conveyer discharging the material over the edges of said trough and at the discharge end thereof, whereby said material will be evenly distributed across the machine.

4. In a threshing machine, the combination, with a grain cleaning mechanism, of an auxiliary threshing device arranged to thresh the repeat material, a conveyer dis-,

posed transversely of the machine and constructed to receive the repeat material, said conveyer having a perforate bottom and an open discharge end, said perforate bottom allowing fine material to be evenly distributed across said cleaning mechanism, and said open discharge end allowing the straw and coarse material which is too large to pass through the perforate bottom of said conveyer to fall upon said cleaning mechanism.

5. The combination, with a grain cleaning mechanism, of an auxiliary threshing device arranged to thresh the repeat material, a repeat elevator, a conveyer disposed transversely of the machine and adapted to receive the repeat material at one end and having means at its opposite end to discharge the coarse material upon said cleaning mechanism, said conveyer having a bottom through which the fine material is dis tributed across said cleaning mechanism, and a spiral operating in said conveyer.

6. The combination, with a grain cleaning mechanism, of a repeat elevator, a con veyer having receiving and discharge ends and arranged to receive the material at its receiving end from said repeat elevator and extending horizontally from one side of the grain cleaning mechanism to a point near the opposite side thereof, said conveyer clelivering at its discharge end the coarse material upon said cleaning mechanism and distributing the finer material evenly upon said cleaning mechanism between said discharge and receiving ends.

7 The combination, with a grain cleaning mechanism, of a repeat elevator, a conveyer arranged to receive the material from said repeat elevator and disposed transversely of the machine, said conveyer having means operating to discharge the coarse material upon said cleaning mechanism at one end of said conveyer and to distribute the finer material evenly upon said cleaning mechanism between said discharge end and the receiving end of said conveyer.

8. The combination, with a grain cleaning mechanism, of a repeat elevator, a perforate conveyer disposed transversely of the In Witness whereof, I have hereunto set machine and having means for discharging my hand this 8th day of July 1908.

the straw and coarse material at one end of said conveyer and to evenly distribute the LUTHER THOMSON finer material upon said cleaning mecha- Witnesses:

nism between the discharge end of said con- RICHARD PAUL,

veyer and the receiving end thereof. J. A. BYINGTON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

